It sounds like you have found a book that provides information without doing everything it can to associate fear and disgust with any sexual act. This is something that is badly needed in this society. It is possible that the warped view some have of sexuality can in part be traced to the education on the matter that they have received as a young person. I think a lot of damage is done at a stage where it would be possible instead to do a lot of good, if we could only get past our own hangups.